{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T11:02:55.267Z","years_from_j2000":26.669,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"kepler-325-c","name":"Kepler-325 c","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2685.0562870428726,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":289.8354219,"dec_deg":49.825607,"epoch_ra_deg":290.011915,"epoch_dec_deg":49.874375,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-325","semi_major_axis_km":15707776.423499998,"periapsis_km":null,"mass_kg":4.174545339586175e+25,"mass_msun":0.0000209944,"constellation":"Cygnus","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-325-c","radius_km":16200.374000000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-325","host_v_mag":15.175,"eccentricity":0,"uncertainties":{"radius_km":[8036.406000000001,8036.406000000001],"distance_ly":[46.35008283732641,46.35008283732641],"host_mass_solar":[0.016,0.014],"host_radius_solar":[0.497,0.497],"host_temperature_k":[200,200],"orbital_period_days":[0.000064,0.000064]},"host_mass_solar":0.914,"inclination_deg":87.01,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.003,"planets_in_system":3,"discovery_facility":"Kepler","host_temperature_k":5752,"orbital_period_days":12.762172,"transit_midpoint_bjd":2454976.73016,"equilibrium_temperature_k":721},"designations":[{"catalog":"Exoplanet","designation":"Kepler-325 c"},{"catalog":"Host star","designation":"Kepler-325"}],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"updated_at":"2026-09-01T22:58:55.274Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}